517 area code: location, time zone and numbers
Area code 517 serves Detroit, Michigan, as a US telephone area code in service since 1947.
- Location
- Detroit, Michigan
- Service since
- 1947
- The time zone
- Eastern time
- Overlay
- None: no other code serves its area
- Calls within the area
- Dialling with 7 digits
- Rate centre list
- 78
- Expected exhaustion
- 2056
- Code for the country
- +1 (United States)
Source: area code report and rate-centre report, both from NANPA public reports, file of 11/01/2026; exhaust year taken from projection 2026-1 in the NANPA projections (April 2026). We are not an official NANPA site.
Get your own 517 number
A 517 number comes from one of two routes. A provider hands out a new number when you sign up for its plan, chosen from what it already has in the code. Numbers a seller already holds are often listed with a pattern, at a one-time price; later you transfer the number to a provider.
Providers sorted by first-year cost
| Provider | Cheapest plan | First year | Link |
|---|---|---|---|
 Free app | Basic (Just for me), free | $0 | Open Google Voice |
 Free app | Free plan, free | $0 | Open TextNow |
 Developer API | Pay-as-you-go local number, $1.15 a month | $13.80 | Open Twilio |
 Second-number app | Standard, $3.99 a month billed yearly | $47.99 | Open Burner |
 Toll-free specialist | Solo, $6.99 a month billed yearly | $84 | Open UniTel Voice |
 Second-number app | Deluxe (local number), $6.99 a month billed yearly | $102.88 | Open GoDaddy Conversations (formerly Smartline) |
Sellers listing local numbers
| Seller | What it sells | Listed price | Monthly fee | Link |
|---|---|---|---|---|
 Marketplace | Local numbers | From $9 one-time | None stated | Search at Exclusive Digits |
 Marketplace | Local and toll-free | From $9.95 one-time | $2.99 a month | Search at NumberBarn |
 Number broker | Local and toll-free | From $99 one-time | None stated | Search at RingBoost |
 Number broker | Local and toll-free | From $100 one-time | None stated | Search at PhoneNumberExpert |
| 212areacode.comNumber broker | Local numbers | From $150 one-time | None stated | Search at 212areacode.com |
Some sellers and providers may pay us a referral fee. Ordering stays as it is: what the first year costs decides the order. How we make money
Places in the 517 area code
For 517, NANPA lists 78 rate centres. Each one is a local calling area where numbers are assigned:
Addison, Adrian, Albion, Allen and Bath. Bell Oak, Blissfield, Britton, Bronson and Brooklyn. Bundy Hill, Burlington, Cambria, Camden and Charlotte. Clarklake, Clayton, Clinton, Coldwater and Coldwater Lake. Concord, Dansville, De Witt, Deerfield and Dimondale. Eaton Rapids, Fitchburg, Fowlerville, Frontier and Grand Ledge. Grass Lake, Hanover, Hillsdale, Holt and Homer. Howell, Hudson, Jackson, Jonesville and Laingsburg. Lansing, Leslie, Litchfield, Mason and Montgomery. Morenci, Mosherville, Mulliken, Munith and Napoleon. Nashville, North Adams, Ogden Center, Onondaga and Onsted. Osseo, Parma, Perry, Portland and Potterville, and 18 more.
Other related area codes
Michigan has other area codes too: 313, 616 and 906, then 810, 248, 734 and 231, plus 989, 586, 269 and 947, and 679.
517 area code questions
Where does area code 517 serve?
Calls to 517 ring in Detroit, Michigan, around Detroit-Warren-Dearborn, MI.
Which country code does a 517 number use?
+1. As part of the North American Numbering Plan, 517 requires +1 517 plus the 7-digit number when you dial from abroad.
What time is it in the 517 area code?
The 517 area uses Eastern time.
Who calls using a 517 number?
Calls can come from homes, mobiles and local businesses with numbers in this code, plus people who fake a local number. On your screen, a 517 number shows where it was assigned, not who is calling.